<script lang="ts" setup name="XtxCarousel">
// defineProps({
//   slides: {
//     type: Array,
//   },
// });
import { ref, PropType } from "vue";
import { BannerItem } from "@/types/data";
const props = defineProps({
  slides: {
    type: Array as PropType<BannerItem[]>,
    required: true,
  },
  autoPlay: {
    type: Boolean,
    default: false,
  },
  duration: {
    type: Number,
    default: 3000,
  },
});
// const props = defineProps<{
//   slides: BannerItem[];
//   autoPlay: boolean;
//   duration: number;
// }>();

const active = ref(0);

const next = () => {
  console.log(timeId, 88);
  /* 下一张
   1-active+1
   2-走到最后一张  active=0   active=slides.length-1
  */
  if (active.value == props.slides.length - 1) {
    active.value = 0;
  } else {
    active.value += 1;
  }
};
const prev = () => {
  /* 上一张
  1-active-1
  2-走到第一张了 跳到最后一张

  */
  if (active.value <= 0) {
    active.value = props.slides.length - 1;
  } else {
    active.value -= 1;
  }
};
var timeId = -1;
const stop = () => {
  /* 清除定时器 */
  clearInterval(timeId);
};

const paly = () => {
  if (!props.autoPlay) return;
  /* autoPlay:true */
  timeId = setInterval(() => {
    next();
  }, props.duration);
};
paly();
</script>
<template>
  <div class="xtx-carousel" @mouseenter="stop" @mouseleave="paly">
    <ul class="carousel-body">
      <li
        v-for="(item, index) in slides"
        :key="item.id"
        class="carousel-item"
        :class="{ fade: active == index }"
      >
        <RouterLink :to="item.hrefUrl">
          <img :src="item.imgUrl" alt="" />
        </RouterLink>
      </li>
    </ul>
    <a @click="prev" href="javascript:;" class="carousel-btn prev"
      ><i class="iconfont icon-angle-left"></i
    ></a>
    <a @click="next" href="javascript:;" class="carousel-btn next"
      ><i class="iconfont icon-angle-right"></i
    ></a>
    <div class="carousel-indicator">
      <span
        v-for="(item, index) in slides"
        :key="item.id"
        :class="{ active: active === index }"
        @mouseenter="active = index"
      ></span>
    </div>
  </div>
</template>

<style scoped lang="less">
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 300px;
  min-height: 150px;
  position: relative;
  .carousel {
    &-body {
      /*.carousel-body  */
      width: 100%;
      height: 100%;
    }
    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5s linear;
      &.fade {
        opacity: 1;
        z-index: 1;
      }
      img {
        width: 100%;
        height: 100%;
      }
    }
    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;
      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        cursor: pointer;
        ~ span {
          margin-left: 12px;
        }
        &.active {
          background: #fff;
        }
      }
    }
    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0, 0, 0, 0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5s;
      &.prev {
        left: 20px;
      }
      &.next {
        right: 20px;
      }
    }
  }
  &:hover {
    .carousel-btn {
      opacity: 1;
    }
  }
}

:deep(.carousel-btn.prev) {
  left: 270px !important;
}
:deep(.carousel-indicator) {
  padding-left: 250px;
}
</style>
